The simple answer would be 'no', but there's a little more to it: If you upgrade, it would probably be to the current version, WL9.5 (unless you can find a WL8 somewhere). And in WL9.5 the internal calculations are now done at 64f bits instead of 32f bits. So theoretically there could be less internal distortion for certain operations - though in a program like WL it is debatable if it's a realistic advantage.